Aptitude - Simple Interest - Discussion
Discussion Forum : Simple Interest - General Questions (Q.No. 5)
5.
Reena took a loan of Rs. 1200 with simple interest for as many years as the rate of interest. If she paid Rs. 432 as interest at the end of the loan period, what was the rate of interest?
Answer: Option
Explanation:
Let rate = R% and time = R years.
| Then, |  |
1200 x R x R |  |
= 432 |
| 100 |
12R2 = 432
R2 = 36
R = 6.
Video Explanation: https://youtu.be/TjjI4iRkzT0
Discussion:
62 comments Page 7 of 7.
Sakamuri veera Brahmanjaneyulu said:
11 months ago
The simple interest for as many years as the rate of interest means;
Let the rate of interest is 12% then the period is 12 years.
so, principle amount(p) = 1200
SI = 432
r = r.
t = r.
SI = ptr/100.
432 = 1200 * r * r/100.
r^2 = 36,
r = 6.
Let the rate of interest is 12% then the period is 12 years.
so, principle amount(p) = 1200
SI = 432
r = r.
t = r.
SI = ptr/100.
432 = 1200 * r * r/100.
r^2 = 36,
r = 6.
(3)
Josvalilly said:
8 months ago
Principal always 100%.
The value of principal = 1200.
SI value = 432.
Rate% * no.of year = SI%.
100% = 1200.
? = 432.
Only divide the same row or the same column. Cross only for multiplication.
Then, R = 6.
The value of principal = 1200.
SI value = 432.
Rate% * no.of year = SI%.
100% = 1200.
? = 432.
Only divide the same row or the same column. Cross only for multiplication.
Then, R = 6.
(2)
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